my wife has a 2003 4Runner, and the A/C only blows cold air if I set the temperature to [Lo]. Any other setting/temp causes only hot air to blow out the vents. A search on the web suggests that the cabin air temp sensor is bad. Most stories are that this got disconnected when people had stereo work done under the dash. I have not. So, I found my sensor, which was covered in 14 years of dust, and tried to source a new one but before I do that how do I tell if this one is bad or not? I hooked up a multitestor and got no response on resistance/ohms (the omega sign, right?). Should it vary the reading by temp? I'm hoping this is dead and I don't have to replace the $1k head unit. Thanks!
